MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  rexuz2 Structured version   Visualization version   Unicode version

Theorem rexuz2 11233
Description: Restricted existential quantification in an upper set of integers. (Contributed by NM, 9-Sep-2005.)
Assertion
Ref Expression
rexuz2  |-  ( E. n  e.  ( ZZ>= `  M ) ph  <->  ( M  e.  ZZ  /\  E. n  e.  ZZ  ( M  <_  n  /\  ph ) ) )
Distinct variable group:    n, M
Allowed substitution hint:    ph( n)

Proof of Theorem rexuz2
StepHypRef Expression
1 eluz2 11188 . . . . . 6  |-  ( n  e.  ( ZZ>= `  M
)  <->  ( M  e.  ZZ  /\  n  e.  ZZ  /\  M  <_  n ) )
2 df-3an 1009 . . . . . 6  |-  ( ( M  e.  ZZ  /\  n  e.  ZZ  /\  M  <_  n )  <->  ( ( M  e.  ZZ  /\  n  e.  ZZ )  /\  M  <_  n ) )
31, 2bitri 257 . . . . 5  |-  ( n  e.  ( ZZ>= `  M
)  <->  ( ( M  e.  ZZ  /\  n  e.  ZZ )  /\  M  <_  n ) )
43anbi1i 709 . . . 4  |-  ( ( n  e.  ( ZZ>= `  M )  /\  ph ) 
<->  ( ( ( M  e.  ZZ  /\  n  e.  ZZ )  /\  M  <_  n )  /\  ph ) )
5 anass 661 . . . . 5  |-  ( ( ( ( M  e.  ZZ  /\  n  e.  ZZ )  /\  M  <_  n )  /\  ph ) 
<->  ( ( M  e.  ZZ  /\  n  e.  ZZ )  /\  ( M  <_  n  /\  ph ) ) )
6 anass 661 . . . . . 6  |-  ( ( ( M  e.  ZZ  /\  n  e.  ZZ )  /\  ( M  <_  n  /\  ph ) )  <-> 
( M  e.  ZZ  /\  ( n  e.  ZZ  /\  ( M  <_  n  /\  ph ) ) ) )
7 an12 814 . . . . . 6  |-  ( ( M  e.  ZZ  /\  ( n  e.  ZZ  /\  ( M  <_  n  /\  ph ) ) )  <-> 
( n  e.  ZZ  /\  ( M  e.  ZZ  /\  ( M  <_  n  /\  ph ) ) ) )
86, 7bitri 257 . . . . 5  |-  ( ( ( M  e.  ZZ  /\  n  e.  ZZ )  /\  ( M  <_  n  /\  ph ) )  <-> 
( n  e.  ZZ  /\  ( M  e.  ZZ  /\  ( M  <_  n  /\  ph ) ) ) )
95, 8bitri 257 . . . 4  |-  ( ( ( ( M  e.  ZZ  /\  n  e.  ZZ )  /\  M  <_  n )  /\  ph ) 
<->  ( n  e.  ZZ  /\  ( M  e.  ZZ  /\  ( M  <_  n  /\  ph ) ) ) )
104, 9bitri 257 . . 3  |-  ( ( n  e.  ( ZZ>= `  M )  /\  ph ) 
<->  ( n  e.  ZZ  /\  ( M  e.  ZZ  /\  ( M  <_  n  /\  ph ) ) ) )
1110rexbii2 2879 . 2  |-  ( E. n  e.  ( ZZ>= `  M ) ph  <->  E. n  e.  ZZ  ( M  e.  ZZ  /\  ( M  <_  n  /\  ph ) ) )
12 r19.42v 2931 . 2  |-  ( E. n  e.  ZZ  ( M  e.  ZZ  /\  ( M  <_  n  /\  ph ) )  <->  ( M  e.  ZZ  /\  E. n  e.  ZZ  ( M  <_  n  /\  ph ) ) )
1311, 12bitri 257 1  |-  ( E. n  e.  ( ZZ>= `  M ) ph  <->  ( M  e.  ZZ  /\  E. n  e.  ZZ  ( M  <_  n  /\  ph ) ) )
Colors of variables: wff setvar class
Syntax hints:    <-> wb 189    /\ wa 376    /\ w3a 1007    e. wcel 1904   E.wrex 2757   class class class wbr 4395   ` cfv 5589    <_ cle 9694   ZZcz 10961   ZZ>=cuz 11182
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1677  ax-4 1690  ax-5 1766  ax-6 1813  ax-7 1859  ax-8 1906  ax-9 1913  ax-10 1932  ax-11 1937  ax-12 1950  ax-13 2104  ax-ext 2451  ax-sep 4518  ax-nul 4527  ax-pow 4579  ax-pr 4639  ax-cnex 9613  ax-resscn 9614
This theorem depends on definitions:  df-bi 190  df-or 377  df-an 378  df-3or 1008  df-3an 1009  df-tru 1455  df-ex 1672  df-nf 1676  df-sb 1806  df-eu 2323  df-mo 2324  df-clab 2458  df-cleq 2464  df-clel 2467  df-nfc 2601  df-ne 2643  df-ral 2761  df-rex 2762  df-rab 2765  df-v 3033  df-sbc 3256  df-dif 3393  df-un 3395  df-in 3397  df-ss 3404  df-nul 3723  df-if 3873  df-pw 3944  df-sn 3960  df-pr 3962  df-op 3966  df-uni 4191  df-br 4396  df-opab 4455  df-mpt 4456  df-id 4754  df-xp 4845  df-rel 4846  df-cnv 4847  df-co 4848  df-dm 4849  df-rn 4850  df-res 4851  df-ima 4852  df-iota 5553  df-fun 5591  df-fn 5592  df-f 5593  df-fv 5597  df-ov 6311  df-neg 9883  df-z 10962  df-uz 11183
This theorem is referenced by:  2rexuz  11234
  Copyright terms: Public domain W3C validator